One Land=Gain Twelve Creatures

Return a Forest you control to its owner's hand: Untap target creature. Activate only once each turn.

Whenever a nontoken creature enters, its controller creates a token that's a copy of that creature. Whenever a nontoken creature leaves the battlefield, exile all tokens with the same name as that creature. When this enchantment leaves the battlefield, exile all tokens created with this enchantment.

: You may put a land card from your hand onto the battlefield.

(This land isn't a spell, it's affected by summoning sickness, and it has ": Add .")

Flying Landfall — Whenever a land you control enters, you may gain control of target creature for as long as you control this creature.